The document defines various geographic features found in deserts such as flash floods, sand, ventifacts, and hoodoos. It notes that deserts experience large temperature ranges from 100 to 40 degrees Fahrenheit and receive less than 10 inches of precipitation annually. Animals and plants in deserts have adapted to the harsh climate by being nocturnal, getting water from seeds and plants, and rarely spending time above ground. The document states that human activity like development, collection, mining, ranching, and hunting have negatively impacted deserts.